list =["colin","123456"]

i=3
while i>0:
    username=input("请输入用户名")
    password=input("请输入密码")
    if username !="colin" and password !="123456":
        i-=1
        print("账号密码错误")
    if i==0:
        print("账号锁死")
    if username=="colin" and password=="123456":
        print("登陆成功")
        break